Editorial standards

These standards apply to the calculators, converters, generators and explanatory pages on tools.tnaado.ca. TNAADO Inc. publishes the site; Ethan Daley builds and maintains it.

A tool should explain what it does

Each tool should identify the inputs it accepts, the result it produces and the assumptions that affect that result. A worked example or calculation helps a reader check the output. An estimate, demonstration or format check must be labelled as one.

Sources and jurisdictions

Tools based on legislation, government thresholds or published standards should link to the relevant primary source and identify the country, region and year that apply. A Canadian rule must not be presented as a United States rule. A source date records when that source was checked; it is separate from a page's edit date.

Checking calculations and outputs

We use software checks and examples to examine calculations, input boundaries and file output. Passing those checks does not make a result a professional assessment. A checksum can test a number's format without proving that the number was issued or belongs to anyone. A tax or financial estimate cannot account for every personal circumstance.

Editorial independence and advertising

Display advertising helps fund the free tools. An advertisement is separate from a tool's calculation, output and explanation. Placement of an ad does not mean we endorse the advertiser, and advertisers do not buy a result in a calculator. The Tools legal hub links the privacy and cookie disclosures that apply here.

AI assistance and responsibility

AI tools assist with research, drafting, code and original visuals. TNAADO is responsible for the published result. An AI-generated answer is not a source: factual claims need supporting evidence, and formulas and examples need checking. We do not represent a generated illustration as documentary evidence.

Limitations and changes

Published rules and external services change. We do not promise that every tool is current at all times. For a decision with financial, legal, health or safety consequences, verify the result with the official source and an appropriate qualified professional.

Corrections

Use our corrections process to report an incorrect result, stale rule, broken file or misleading explanation. Include the page address and a reproducible example using made-up data. Please do not send passwords, identity numbers or private documents.

Updated November 11, 2026. Terms for TNAADO Tools.